diff --git a/glpk-4.61.tar.gz b/glpk-4.61.tar.gz
deleted file mode 100644
index 0cdda3f..0000000
--- a/glpk-4.61.tar.gz
+++ /dev/null
@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:9866de41777782d4ce21da11b88573b66bb7858574f89c28be6967ac22dfaba9
-size 4116291
diff --git a/glpk-4.61.tar.gz.sig b/glpk-4.61.tar.gz.sig
deleted file mode 100644
index f7c5ecf..0000000
Binary files a/glpk-4.61.tar.gz.sig and /dev/null differ
diff --git a/glpk-4.63.tar.gz b/glpk-4.63.tar.gz
new file mode 100644
index 0000000..2500531
--- /dev/null
+++ b/glpk-4.63.tar.gz
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:914d27f1a51c2bf4a51f1bd4a507f875fcca99db7b219380b836a25b29b3e7f6
+size 4131787
diff --git a/glpk-4.63.tar.gz.sig b/glpk-4.63.tar.gz.sig
new file mode 100644
index 0000000..1885a26
Binary files /dev/null and b/glpk-4.63.tar.gz.sig differ
diff --git a/glpk.changes b/glpk.changes
index 7a8d919..c62e0ef 100644
--- a/glpk.changes
+++ b/glpk.changes
@@ -1,3 +1,26 @@
+-------------------------------------------------------------------
+Mon Jul 31 13:31:32 UTC 2017 - mpluskal@suse.com
+
+- Update to version 4.63:
+  * A "smart" LP perturbation was implemented in the primal and
+    dual simplex solvers.
+  * The long-step technique was implemented for phase I of the
+    primal simplex solver.
+  * An internal objective scaling was included in both primal and
+    ual simplex solvers.
+  * The Posix version of glp_time (glpk/src/env/time.c) was changed
+    to resolve time_t issue on msys2.
+  * Three new example models in MathProg were added.
+* Changes for version 4.62:
+  * The bound perturbation technique was included in the primal
+    simplex solver to improve numerical stability and avoid
+    cycling.
+  * A range bug was fixed in the MPS reading routine.
+  * Changes were made to provide 64-bit portability of the Minisat
+    solver.
+  * Calls to non-thread-safe functions gmtime, strerror, and strtok
+    were replaced by calls to corresponding thread-safe equivalents
+
 -------------------------------------------------------------------
 Mon Jan 23 16:00:00 UTC 2017 - mpluskal@suse.com
 
diff --git a/glpk.keyring b/glpk.keyring
index f5a8bc3..fc6a78d 100644
Binary files a/glpk.keyring and b/glpk.keyring differ
diff --git a/glpk.spec b/glpk.spec
index af9ed2f..ceff3bc 100644
--- a/glpk.spec
+++ b/glpk.spec
@@ -18,7 +18,7 @@
 
 %define lname   libglpk40
 Name:           glpk
-Version:        4.61
+Version:        4.63
 Release:        0
 Summary:        GNU Linear Programming Kit
 License:        GPL-3.0
@@ -97,7 +97,6 @@ make %{?_smp_mflags} check
 %postun -n %{lname} -p /sbin/ldconfig
 
 %files
-%defattr(-,root,root)
 %dir %{_docdir}/%{name}
 %{_docdir}/%{name}/AUTHORS
 %{_docdir}/%{name}/ChangeLog
@@ -107,16 +106,13 @@ make %{?_smp_mflags} check
 %{_bindir}/glpsol
 
 %files -n %{lname}
-%defattr(-,root,root)
 %{_libdir}/libglpk.so.*
 
 %files devel
-%defattr(-,root,root)
 %{_includedir}/*
 %{_libdir}/libglpk.so
 
 %files doc
-%defattr(-,root,root)
 %dir %{_docdir}/%{name}
 %{_docdir}/%{name}/doc
 %{_docdir}/%{name}/examples